Question

4x-y=3
2x+3y=10
Método da substituição!

Answer 1

Resposta:

4x-y= 3

2x+3y= 10

----------------

-y= -4x+3

y= 4x-3

2x+3(4x-3)=10

2x+12x-9= 10

14x= 10+9

14x= 19

x= 19/14

y= 4(19/14)-3

y= 2(19/7)-3

y= 38/7-3

y= 38-21/7

y= 17/7

S={(19/14,17/7)}